Two three-dimensional metal–organic frameworks constructed by thiazole-spaced pyridinecarboxylates exhibiting selective gas sorption or antiferromagnetic coupling?

New Journal of Chemistry Pub Date: 2012-11-05 DOI: 10.1039/C2NJ40805H

Abstract

The ligand of 2-(4-pyridyl)-4-methylthiazole-5-carboxylic acid (HL) has been employed to react with Cd(NO3)2·6H2O or a 50% aqueous solution of Mn(NO3)2, to yield two isomorphous three-dimensional (3D) coordination compounds, [Cd(L)2](H2O)4(DMF) (1) and [Mn(L)2](H2O)3(DMF) (2). The structures and properties of the compounds have been characterized by several techniques. Both compounds are three-dimensional (3D) neutral frameworks possessing permanent pores that give rise to straight one-dimensional channels. Compound 1 displays adsorption selectivity for CO2, while the low pressure sorption of H2, N2, CH4, CO, O2 at 298 K are negligible; Compound 2 shows weak anti-ferromagnetic coupling between the magnetic centres.

Graphical abstract: Two three-dimensional metal–organic frameworks constructed by thiazole-spaced pyridinecarboxylates exhibiting selective gas sorption or antiferromagnetic coupling
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